13.5cm Random ColorsThe Ongrok Premium Doob Tubes is a air tight way to store store your joints. It is made from premium materials and includes rubber o rings at each end of the tube, protecting your joints from weather and humidity. The bottom opens up for easy cleaning and the top cap is Dimond Knurled for a grippy feel when opening and closing. It stands at 4.75"(120mm) tall and has a Dia. of 0.65"(16.5mm). Each pack comes with extra o rings.